This position is listed on behalf of a partner company, which manages all applications and next steps. Our partner is looking for a Cybersecurity Engineer based in the United States. We are seeking an experienced Cybersecurity Engineer to lead the security and compliance of a complex, unclassified IT environment supporting sensitive defense and national security operations. In this hands-on individual contributor role, you will strengthen security controls, assess technical configurations, and maintain compliance with NIST SP 800-171 and CMMC Level 2 requirements. You will take ownership of compliance documentation, technical self-assessments, vulnerability remediation, and audit readiness while helping build and improve an evolving cybersecurity program. Working closely with enterprise IT, cybersecurity operations, and organizational leadership, you will translate regulatory requirements into practical security measures that protect Controlled Unclassified Information (CUI). This opportunity is ideal for a technically strong security professional who enjoys taking initiative, improving processes, and balancing rigorous compliance standards with real-world infrastructure needs. You will play a critical role in maintaining security, accountability, and trust across cloud, hybrid, and enterprise systems.